Synthesis, characterization and application of CdSe quantum dots

Surana, Karan; Singh, Pramod K.; Rhee, Hee‐Woo; Bhattacharya, Bhaskar

doi:10.1016/j.jiec.2014.01.019

Cited by 71 publications

(39 citation statements)

References 17 publications

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“…In this report, different sizes of CdSe QDs were synthesized and their impact on HER performance was investigated. Among the different types of available QDs, CdSe QDs are known for their high luminescence, tunable bandgap, and broad absorption …”

Section: Resultsmentioning

confidence: 99%

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

Tekalgne

Hasani

et al. 2019

Physica Status Solidi (a)

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In this paper, a facile method for synthesizing WS2 nanoflowers (NFs) and CdSe quantum dots (QDs) using hydrothermal and hot injection methods, are reported, respectively. Additionally, the photocatalytic activity of a CdSe QDs/WS2 NF nanocomposite is analyzed in a typical three‐electrode electrochemical cell. It is found that the CdSe QDs/WS2 NF hybrid exhibits a current density of −1.12 mA at 0 V and a Tafel slope of 82 mV dec−1, which are superior to the values of bare WS2 NFs (current density of −0.25 mA and Tafel slope of 150 mV dec−1). This improvement of photocatalytic performance is attributed to the wide range of light absorption for e−/h+ generation provided by the CdSe QDs, as well as the large surface area and numerous active sites for hydrogen production provided by WS2 NFs. Therefore, the CdSe QDs/WS2 NF hybrid structure is a promising candidate for highly effective and stable photocatalytic performance under solar light illumination for hydrogen production.

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Section: Resultsmentioning

confidence: 99%

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

Tekalgne

Hasani

et al. 2019

Physica Status Solidi (a)

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“…Kuantum dot CdSe memiliki kelebihan dibanding kuantum dot lainnya, yaitu kemudahan dalam hal sintesis dan tunabilitas, sehingga menjadikannya jenis kuantum dot yang banyak diteliti [9]. Kuantum dot jenis ini adalah nanopartikel luminesensi yang banyak diaplikasikan sebagai dye untuk sensitizer panel surya [10]. Selain itu, kuantum dot CdSe juga memiliki peluang yang besar untuk diaplikasikan dalam bidang teknologi sains luar angkasa, fabrikasi panel surya, dan sensor kimia [11].…”

Section: Pendahuluanunclassified

“…Meskipun memiliki aplikasi yang cukup menjanjikan, kuantum dot jenis ini tidak digunakan untuk aplikasi biomedis, karena bersifat toksik [9]. Pembuatan kuantum dot CdS dapat dilakukan dengan metode sintesis dari bubuk logam selenium (Se), kadmium asetat Cd(CH3COO)2, dan HOCH2CH2SH (disebut juga sebagai βME) [10]. Metode lain untuk yang dapat digunakan untuk membuat kuantum dot CdSe adalah fabrikasi melalui proses hidrolisis SeSO3 2-dan pengikatan secara kovalen terhadap ion Cd 2+ oleh dispersant mercapoacetate [12].…”

Section: Pendahuluanunclassified

Analisis Pengaruh Penambahan Nanopartikel Emas Terhadap Intensitas Emisi Dan Waktu Peluruhan Fotoluminesensi Kuantum Dot Cdse 618

Pattersons

Isnaeni

2018

SPEKTRA

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AbstrakTelah dilakukan pencampuran nanopartikel emas dengan kuantum dot CdSe 618. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penambahan nanopartikel emas terhadap intensitas emisi dan waktu peluruhan fotoluminesensi kuantum dot CdSe 618. Dalam 2 mL kuantum dot CdSe 618, ditambahkan nanopartikel emas sebanyak 40 µL, 80 µL, dan 120 µL. Pada setiap penambahan tersebut, dilakukan pengujian fotoluminesensi dan time-resolved photoluminescence, masing-masing untuk mengetahui intensitas emisi dan waktu peluruhan fotoluminesensi kuantum dot CdSe 618 setelah ditambahkan dengan nanopartikel emas. Dilakukan pula pengukuran terhadap rentang panjang gelombang absorpsi dari nanopartikel emas, beserta ukuran diameter partikel-partikelnya. Hasil pengujian menunjukkan bahwa secara keseluruhan, intensitas emisi kuantum dot CdSe 618 setelah ditambahkan dengan nanopartikel emas menjadi lebih rendah, dan nilai waktu peluruhan fotoluminesensi menjadi lebih besar. Penurunan intensitas emisi dan peningkatan waktu peluruhan fotoluminesensi diakibatkan oleh kemunculan plasmon pada nanopartikel emas. Kata-kata kunci: nanopartikel emas, kuantum dot, fotoluminesensi. AbstractWe have done the mixing of gold nanoparticles and CdSe 618 quantum dots. The purpose of this study is to see the influence of gold nanoparticles increment to emission intensity and photoluminescence decay time of CdSe 618 quantum dots. Into 2 mL of CdSe 618 quantum dots, we added gold nanoparticles as much as 40 µL, 80 µL, and 120 µL. At each adding, we did photoluminescence and time-resolved photoluminescence testings, to see emission intensity and photoluminescence time decay of CdSe 618 quantum dots after the adding of gold nanoparticles. We also did a measurement of absorption wavelength range of gold nanoparticles, along with diameter size of the particles. The results showed that, overall, the emission intensity of CdSe 618 quantum dots became lower after the adding of gold nanoparticles, and the value of photoluminescence decay time became bigger. The decrease of emission intensity and the increment of photoluminescence decay time were caused by the appearance of a plasmon at gold nanoparticles.

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“…reported the successful synthesis using 2‐mercaptoethanol, as a capping agent. Unfortunately the capping was unsuitable for long lasting storage, since the solution changed its color over time . Other capping agents are usually used successfully in aqueous or organic synthetic methods, like pyridine, amines, [8][9] and thiols .…”

Section: Figurementioning

confidence: 99%

Synthesis of Cadmium Selenide Quantum Dots, Using 2,2‐Bipyridine as a Capping and Phase Transfer Agent

2017

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Cadmium selenide quantum dots (CdSe QDs), were synthesized by one‐pot or water‐to‐organic phase transfer and capped with molten 2,2′‐bipyridine (bipy). The obtained CdSe QDs by the two‐step procedure, reveal average sizes of 2 nm while the one‐pot are mixed with secondary salt products and bipy and are undetectable by TEM. However the absorption peak of both CdSe QDs was at 425 nm and the emission band is centered at 535 nm, with a band width at half height of 77 nm, when excited with 425 nm light. The two‐step CdSe QDs synthesis has the great advantage of capping the CdSe QDs with bipy, forming a solid phase, which is easily stored and dispersed in most of the organic solvents. On the other hand, the one‐pot procedure requires an extra step to remove the secondary products.

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Synthesis, characterization and application of CdSe quantum dots

Cited by 71 publications

References 17 publications

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

Analisis Pengaruh Penambahan Nanopartikel Emas Terhadap Intensitas Emisi Dan Waktu Peluruhan Fotoluminesensi Kuantum Dot Cdse 618

Synthesis of Cadmium Selenide Quantum Dots, Using 2,2‐Bipyridine as a Capping and Phase Transfer Agent

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Synthesis, characterization and application of CdSe quantum dots

Cited by 71 publications

References 17 publications

CdSe Quantum Dots Doped WS2 Nanoflowers for Enhanced Solar Hydrogen Production

CdSe Quantum Dots Doped WS2 Nanoflowers for Enhanced Solar Hydrogen Production

Analisis Pengaruh Penambahan Nanopartikel Emas Terhadap Intensitas Emisi Dan Waktu Peluruhan Fotoluminesensi Kuantum Dot Cdse 618

Synthesis of Cadmium Selenide Quantum Dots, Using 2,2‐Bipyridine as a Capping and Phase Transfer Agent

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CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production